A snack bar does not give an itemised bill tor drinks In the past three visits, the total bills have been:
1) Three teas, two coffees and one lemonade cost £9.80
2) One tea four coffees and two lemonades cost £13.60
3) Two teas, two coffees and two lemonades cost £10
Calculate the price for a single coffee, given the prices have been the same for the three visits.
Identify which of the following statements about the mean of a data set is correct.
Identify which of the following is not true about the population variance of a set of data.
Identify which of the following statements is not true about the probability density function of a continuous random variable.
In an Olympic Race there are 100 competitors.
Calculate the number of ways of distributing the Gold. Silver and Bronze medals amongst all of the competitors.
A)

B)

C)

D)

Calculate the single extreme point of the function: f( x , y) = x 2 + ( y – 2 ) 2 .